The item you purchased is a Pro Battery Grip for the Nikon D300, has the same function as MB-D10. It can hold 8 AA batteries or two EN-EL3e batteries simultaneously - one in the camera body and one in the MB-D10 - effectively doubling your shooting capacity. Vertical shutter release button on the Battery Grip makes shooting with the camera in a vertical position much easier, adding stability to the camera.

In this professional edition, it comes with several functional buttons as the flash above showing. It will be much convenient while using. It provides additional shutter release, main dial, sub-main dial, AE lock/FE lock for easier vertical shooting.

Key Feature
Size: 152×55×76mm
Weight: about 0.45kg
Color: Black
Material: fireproof ABS (475)

Infrared Remote Control Device
Within 10 meters, using the controller to the infrared remote control device of the grip, you can control the shutter

Package Include:
• Battery Grip
• Battery Holder for 1 EN-EL3e batteries
• Battery Holder for 8AA batteries (Battery not inlcuded)
• Car Charger
• IR Remote
• Original Manufactory Package
• English Manual